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BOSTON MARATHON 2025

Joon Ki Lee

Bib: 24885•M

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M70-74)
#0 / 228
Top 42%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:36/mi
29:50
↑ 97↓ 3451.5%
10K· 6.21 mi
9:24/mi
59:03
↑ 79↓ 1380.4%
15K· 9.32 mi
9:20/mi
1:28:04
↑ 67↓ 78
20K· 12.43 mi
9:26/mi
1:57:24
↑ 106↓ 860.1%
Half· 13.11 mi
8:58/mi
2:03:31
↑ 19↓ 370.5%
25K· 15.53 mi
9:57/mi
2:27:38
↑ 66↓ 880.2%
30K· 18.64 mi
10:25/mi
3:00:00
↑ 181↓ 1480.2%
20M
10:13/mi
3:13:53
↑ 64↓ 500.2%
21M
10:52/mi
3:24:45
↑ 106↓ 241.6%
35K· 21.75 mi
9:41/mi
3:32:00
↑ 17↓ 861.7%
23M
10:02/mi
3:44:34
↑ 23↓ 630.6%
24M
10:33/mi
3:55:07
↓ 821.3%
40K· 24.85 mi
10:23/mi
4:04:00
↓ 200.3%
25.2M
11:48/mi
4:08:04
↑ 13↓ 160.2%
Finish· 26.22 mi
9:43/mi
4:17:58
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:31
Pace9:25 /mi
2nd Half
Distance13.11 mi
Time2:14:27
Pace10:15 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:31:0029:509:3629:50
9:36
-
10K
6.21 mi12:00:1359:039:3029:13
9:24
-0:12
15K
9.32 mi12:29:141:28:049:2729:01
9:20
-0:04
20K
12.43 mi12:58:341:57:249:2729:20
9:26
+0:06
Half
13.11 mi13:04:412:03:319:256:07
8:58
-0:28
25K
15.53 mi13:28:482:27:389:3024:07
9:57
+0:59
30K
18.64 mi14:01:103:00:009:3932:22
10:25
+0:28
20M
20.00 mi14:15:033:13:539:4213:53
10:13
-0:12
21M
21.00 mi14:25:553:24:459:4510:52
10:52
+0:39
35K
21.75 mi14:33:103:32:009:457:15
9:41
-1:11
23M
23.00 mi14:45:443:44:349:4612:34
10:02
+0:21
24M
24.00 mi14:56:173:55:079:4810:33
10:33
+0:31
40K
24.85 mi15:05:104:04:009:498:53
10:23
-0:10
25.2M
25.20 mi15:09:144:08:049:514:04
11:48
+1:25
Finish
26.22 mi15:19:084:17:589:519:54
9:43
-2:05

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

8:58 /mi

Average Pace

9:51 /mi

Slowest Pace

11:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:31

48% of race

Time at Steady Pace

1:07:43

26% of race

Time at Slower Pace

1:06:44

26% of race

Average Pace: 9:50 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:31:0029:509:3629:50
9:36
#24558
10K
6.21 mi12:00:1359:039:3029:13
9:24
#24188
15K
9.32 mi12:29:141:28:049:2729:01
9:20
#23900
20K
12.43 mi12:58:341:57:249:2729:20
9:26
#23616
Half
13.11 mi13:04:412:03:319:256:07
8:58
#23526
25K
15.53 mi13:28:482:27:389:3024:07
9:57
#23425
30K
18.64 mi14:01:103:00:009:3932:22
10:25
#23265
20M
20.00 mi14:15:033:13:539:4213:53
10:13
#23136
21M
21.00 mi14:25:553:24:459:4510:52
10:52
#23007
35K
21.75 mi14:33:103:32:009:457:15
9:41
#22939
23M
23.00 mi14:45:443:44:349:4612:34
10:02
#22798
24M
24.00 mi14:56:173:55:079:4810:33
10:33
#22767
40K
24.85 mi15:05:104:04:009:498:53
10:23
#22725
25.2M
25.20 mi15:09:144:08:049:514:04
11:48
#22721
Finish
26.22 mi15:19:084:17:589:519:54
9:43
#22703
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi24558145091450923319(Top 82%)13983(Top 87%)13983(Top 6133%)
10K6.21 mi3.10 mi24188+37014334+17514334+17523834(Top 84%)14185(Top 88%)14185(Top 6221%)
15K9.32 mi3.11 mi23900+28814217+11714217+11723319(Top 82%)13983(Top 87%)13983(Top 6133%)
20K12.43 mi3.11 mi23616+28414083+13414083+13422716(Top 80%)13673(Top 85%)13673(Top 5997%)
Half13.11 mi0.68 mi23526+9014045+3814045+3821668(Top 76%)13208(Top 82%)13208(Top 5793%)
25K15.53 mi2.42 mi23425+10113992+5313992+5323111(Top 81%)13791(Top 86%)13791(Top 6049%)
30K18.64 mi3.11 mi23265+16013874+11813874+11822744(Top 80%)13503(Top 84%)13503(Top 5922%)
20M20.00 mi1.36 mi23136+12913796+7813796+7821610(Top 76%)12866(Top 80%)12866(Top 5643%)
21M21.00 mi1.00 mi23007+12913716+8013716+8021029(Top 74%)12517(Top 78%)12517(Top 5490%)
35K21.75 mi0.75 mi22939+6813669+4713669+4720976(Top 74%)12438(Top 77%)12438(Top 5455%)
23M23.00 mi1.25 mi22798+14113586+8313586+8320606(Top 73%)12203(Top 76%)12203(Top 5352%)
24M24.00 mi1.00 mi22767+3113554+3213554+3222949(Top 81%)13281(Top 82%)13281(Top 5825%)
40K24.85 mi0.85 mi22725+4213514+4013514+4021617(Top 76%)12571(Top 78%)12571(Top 5514%)
25.2M25.20 mi0.35 mi22721+413504+1013504+1022749(Top 80%)13152(Top 82%)13152(Top 5768%)
Finish26.22 mi1.02 mi22703+1813477+2713477+2721969(Top 77%)12774(Top 79%)12774(Top 5603%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23319

Males

13983

M70-74

13983

5K→10K

3.1 - 6.2 mi

Top 84%
×5story building
+79ft-138ft

Overall

23834

Males

14185

M70-74

14185

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23319

Males

13983

M70-74

13983

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

22716

Males

13673

M70-74

13673

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

21668

Males

13208

M70-74

13208

Half→25K

13.1 - 15.5 mi

Top 81%
×4story building
+66ft-88ft

Overall

23111

Males

13791

M70-74

13791

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

22744

Males

13503

M70-74

13503

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

21610

Males

12866

M70-74

12866

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

21029

Males

12517

M70-74

12517

21M→35K

21.0 - 21.8 mi

Top 74%
×7story building
+17ft-86ft

Overall

20976

Males

12438

M70-74

12438

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

20606

Males

12203

M70-74

12203

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

22949

Males

13281

M70-74

13281

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21617

Males

12571

M70-74

12571

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

22749

Males

13152

M70-74

13152

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

21969

Males

12774

M70-74

12774

Passing Analysis

Category:
Athletes Passed
2325
Passed By
470
Net Change
+1855
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24558
5K → 10K44777+370#24558#24188
10K → 15K33244+288#24188#23900
15K → 20K30521+284#23900#23616
20K → Half900+90#23616#23526
Half → 25K17877+101#23526#23425
25K → 30K24787+160#23425#23265
30K → 20M14819+129#23265#23136
20M → 21M14415+129#23136#23007
21M → 35K8113+68#23007#22939
35K → 23M1476+141#22939#22798
23M → 24M6332+31#22798#22767
24M → 40K7028+42#22767#22725
40K → 25.2M2218+4#22725#22721
25.2M → Finish5133+18#22721#22703
TOTALS2325470+1855
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing